제출 #493106

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
493106		irmuun	Intergalactic ship (IZhO19_xorsum)	C++17	9 / 100	2086 ms	3352 KiB

xorsum

#include<bits/stdc++.h>
using namespace std;
#define pb push_back
#define ll long long
#define ff first
#define ss second
#define PI 3.14159265359
ll n,m,t,p,sum[1001],a[1001],b[1001],c,d,e,f,i,j,k,mod=1000000007,mod1=998244353,MAX=1e18,ans,q,l[100001],r[100001],x[100001];
string s,u;
ll df[101];
vector<ll>v;
vector<ll>dv[101];
void dfs(ll x){
    df[x]=1;
    for(ll i=0;i<dv[x].size();i++){
        if(df[dv[x][i]]==0){
            dfs(dv[x][i]);
        }
    }
}
ll fastPow(ll a,ll b){
    ll d=1;
    while(b>0){
        if(b%2==1){
            d=d*a%mod;
        }
        b/=2;
        a=a*a%mod;
    }
    return d;
}
ll check(){
	sum[0]=0;
	for(ll i=1;i<=n;i++){
		sum[i]=sum[i-1]+b[i];
	}
	ll ans=0;
	for(ll i=1;i<=n;i++){
		for(ll j=i;j<=n;j++){
			ans=(ans+(sum[j]-sum[i-1])*(sum[j]-sum[i-1]))%mod;
		}
	}
	return ans;
}
int main(){
	cin>>n;
	for(i=1;i<=n;i++){
		cin>>a[i];
	}
	cin>>q;
	for(i=1;i<=q;i++){
		cin>>l[i]>>r[i]>>x[i];
	}
	f=fastPow(2,q);
	ans=0;
	for(i=1;i<=f;i++){
		d=i;
		for(j=1;j<=n;j++){
			b[j]=a[j];
		}
		for(j=1;j<=q;j++){
			if(d%2==1){
				for(k=l[j];k<=r[j];k++){
					b[k]^=x[j];
				}
			}
			d/=2;
		}
		ans=(ans+check())%mod;
	}
	cout<<ans;
}

컴파일 시 표준 에러 (stderr) 메시지

xorsum.cpp: In function 'void dfs(long long int)':
xorsum.cpp:15:17: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   15 |     for(ll i=0;i<dv[x].size();i++){
      |                ~^~~~~~~~~~~~~

• Subtask 1: 4 / 4
• Subtask 2: 5 / 5
• Subtask 3: 0 / 6
• Subtask 4: 0 / 9
• Subtask 5: 0 / 8
• Subtask 6: 0 / 11
• Subtask 7: 0 / 19
• Subtask 8: 0 / 30
• Subtask 9: 0 / 8